Schedule-aware DVFS Algorithm on Android Platforms for Energy Minimization

Saving energy of the portable devices including smartphones have become a critical design problem. Modern components of these devices are suffering from hunger of power. In this purpose, many researchers studied how to minimize the energy consumption. Dynamic voltage and frequency scaling (DVFS) is an effective energy saving technique for these portable devices. This paper proposes a simple but novel DVFS algorithm on Android based smartphones. We use the information from operating system scheduler and process history table which is made by our proposed method. Compared to previous work, our schedule-aware DVFS algorithm is superior in terms of energy saving. Experimental results show that 34% of power saving compared to performance governor. Additionally, when proposed method was used, there is negligible performance overhead. Keywords—dynamic voltage and frequency scaling (DVFS), android, operating system, energy-aware embedded system.